51 
THE BRITISH AND LONDON PHARMACOPEIAS COMPARED. 
FOR THE USE OF PRESCRI13ERS. 
All the important preparations of the London Pharmacopoeia are now con¬ 
tained in the British Pharmacopoeia, and, with very few exceptions, the compo¬ 
sition and strength of the medicines remain unaltered. In a few instances, 
however, it has been found necessary to make some alterations, so as to establish 
uniformity, and to make the same medicines applicable in England, Scotland, 
and Ireland, as contemplated by the Legislature in providing for the publica¬ 
tion of a British Pharmacopoeia. 
The following are the only material changes requiring the special attention of 
physicians who have been accustomed to prescribe from the London Pharma¬ 
copoeia :— 
Acetum Cantharidis. Rather stronger than the L.P., but not so powerful 
as the Edin. and Dubl. preparations. 
Acidum Phosphori- 1 Stronger than the L. P., in the proportion of 10 to 
cum Dilutum. ) 8 7. 
Decoctum Aloes Com- 1 Rather stronger of aloes than L. P., but not so 
positum. ) strung as in 1864. It now contains 4 grains of 
extract of aloes in a fluid ounce. 
Emplastrum Bella- ") Made with an alcoholic extract of belladonna. Ad- 
donnjE. ) heres to the skin without an adhesive margin. 
Liquor Arsenici Hy-1 This is nearly three times the strength of Liq. Hy¬ 
drochloric us. ) senici Chloridi, Lond ., being now made to corre¬ 
spond in strength with Liquor Arsenicalis. It 
contains ^ grain of arsenious acid in f 3 L 
Liquor Morphine Ace-^ 
tatis, and Liquor i 
Morphine Hydro- j 
chloratis. J 
Pulvis A.NTIMONIALIS. 
PuLVIS ClNNAMOMI 
COMPOSITUS. 
Pulvis Cret^e Aroma 
ticus. 
Spiritus Ammonite 
Aromaticus. 
Spiritus Juniperi, 
Lavandula 
Menth^e Pi 
1 
} 
1 
J 
PERIT.E, 
Myristic®:, 
Rosmarini. 
Tinctura Aconiti. 
Tinctura Belladonnje 
V lNUM Opii .... 
11 
»1 
Half the strength of L. P. They contain | grain of 
morphia salt in f 5 j. 
More active and more definite in composition than 
the P. Antimonii Composttus , Lond. It now con¬ 
sists of 1 part oxide of antimony and 2 parts 
phosphate of lime. 
Long pepper omitted, making the composition similar 
to Pulv. Aromaticus , Edin. 
The dry ingredients of Confectio Aromatica y Lond. 
Stronger in spirit, and about one-half stronger in 
ammonia, than L. P. 
Stronger and more definite in strength than the L. P. 
preparations. They all contain 1 volume of essen¬ 
tial oil in 50 volumes of the spirit. 
One-third the strength of L. P. 
About half the strength of L. P. 
Rather weaker than L.P. It contains 1 oz. extract 
of opium in a pint. 
E 2 
